Liquid-elevating apparatus



I H. KAPFERER. LIQU I D ELEVATING APPARATUS. APPElqAnoNnLED-MAR.20,191s.

Patgnted Feb. 7, 1922.

2 SHEETS-SHEET 1.

I ere,-

H. KAPFERER.

LIQUID ELEVATING APPARATUS.

APPLICATION FILED MAR. 20, |91s.

Patented Feb. 7, 1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE. i

HENRI or PARIS, FRANCE, Assrenon '10 LA soom'rn As'raA, or BILLA N-COURT, amon, A COMPANY ORGANIZED ACCORDING TO rumor: L W.

LIQUID-ELEVATING' APPARATUS.

Patented Feb. 7, 1922.

' Application filed March 20 1918. Serial No. 223,585.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 1921, 41 STAT, L,1318.)

To all whom it may concern:

Be it known that I, HENRI KAPFERER, a .citizen of the Republic ofFrance, and resident of Paris, France, have invented cer- 5 tain new anduseful Improvements in Liquid-Elevating Apparatus, of which thefollowing is a specification.

The present invention relates to a liquid elevator essentiallycharacterizedby an air pump acting on a pulsator which separates the airspace from that of the liquid and is combined with a non return valve inorder to determine by the pulsations of the membrane or diaphragm of thepulsator and by the play of the clack or fiapvalves, the setting inmotion of the liquid without any contact with the mechanical parts ofthe pump and under the best conditions of fluid tightness.

In the annexed drawing given by way of example only Figure 1 is alongitudinal section of an 1 air pump used in connection with apulsator, in accordance with this invention. I

Figure 2 is a longitudinal sectionof a portion of an air pump showing amodified non return valve. I

Figures 3 and-4 illustrate two forms of pulsator pump, in accordancewith this invention. v

Figure 5 shows a longitudinal section of a manually operated air pumpaccording to the present invention. 3

. In theconstructional form shown in Figure 1, the air pump comprises acasing a in which rotates in the ball bearings a (1 a shaft having aworm b engaging .with a worm wheel I) provided with a crank pin 6 Thecrank pin Z2 is connectedby a rod 0 to a gudgeonor trunnion pin bearingd in the interior of the piston d in a cylindrical The shaft carryingthe worm. b is provided with a driving pulley b or equivalent exteriorof the casing w. 7

'The cylindrical body d comprises a fiat ring e, which serves to fix itwitha washer e.- betweenan internal flange a,v on the casing' a and thecircumference of a fuselage f so which completes pump. The cylindricalbody d is prolonged by a tube h'having' at the extreme end a globular orbulbous formation to which is suitably fixed the flexible hoseconnecting the pump to the pulsator.

An auxiliary clack valve or non return valve 9 provides for therestoration of the atmospheric pressure in the passage of the pump onthe compression stroke. This valve 9 carries a rod g and is subjected tothe action of a spring It is disposed in a guide box or casing g on thecover d of the cylindrical body d of the air pump; the valve box orcasing g is in communication with the air by openings g and on the otherside an opening 9", throu h which freely as asses the rod 19', allows 0%communication etween the pump cylinder and consequently the tube h whichis connected to the pulsator, and the valve box. Whenthe valve under theaction of the spring 9 closes the opening 9, the suction or com pressionof the air pump is directly exerted on the diaphragm of the pulsator,but when the rod 9' bears on the washer q placed against the piston,which occurs about the end of the compression stroke,. the valve 9.isforced away from'the opening 9? and atmospheric pressure isestablished through the openings 9 the space between the washer g andthe cover d and in the tube h.

In the modification shown in Figure 2, I the valve 9', under the actionof'the spring 9 is slidably mounted in the tube It which connects'thecylindrical body with diarphragm of the pulsator, and the tubularirod gis provided'with openings g which about. the end of the com ression.stroke places the pump body and t e tube 72. in communication with theatmosphere,%rough the openings 9 and and the cleara ce existing betweenthe wa ls of the casing g and the valve 9.

The auxiliary valve limits the excess pressure at the end of the strokeand the-air losses. in the compression chamber of the air pump, and italways ensures at the be ginning of the suction stroke, @constant'volume of air, and consequently a definite and ,sufiicient suctionaction on the pulsator diaphragm, whatever may the relative 0 valve, ineffect, if the reservoir is lower than 1 the valve casing of thepulsator, .the depression necessary in this casing to "'raise theliquid, causes at the end of the suction stroke, the entry between thepiston and the pul'sator, of a certain quantity of supplementary airwhich stops the action of the pulsator.

Y The pulsator may be formed by a casing divided by a flexiblediaphragm, into two compartments, one communicating with the air pump,the other with the li uid or column of liquid to be. raised. T e ulsatoris preferably formed as shewn in igures 3 and 4, by a perfectlyfluid-tight aneroid metallic casing. v

In the construction shewn in Figure 3, the pulsator comprises a rigidcasing 2" communicating by'one wall and a tubular meinher 2'? with thevalve casing is interposed in the length of the pipe as, y or passage inwhich the liquid rises. In the interior of thecasing z" 1s arranged ananeroid box m surrounded by the liquid and formed by flexible metallicwalls which may be corrugated. One of the walls of this box or casih g mis provided with a tube'i passing fluid -tightly through the adjacentwall z" of the rigid casing and to which tube 2' is connected theinduction nozzle of the air pump, the wall 2' of the rigid casing beingprovlded with a tube i which communicates with the space between thetw'o nonre-tu'rn 'valves j 7' superposed in the casing k. These twovalves are arranged, the one 7' onthe end of the tube 1: supported bythe lower reservoir containing the liquid to be' raised, the other 7" onthe tube is? connected to the upper reservoir which isto receive theelevated liquid.

. In these conditions, and under the suc tion action of the pump, thedepression which is producedin the interior of the box or casing mdetermines the approach of the walls of e aneroid box in such mannerthat there results-an inc in the capa'cit of the'casing v1 surroundingthe box-m which determines the lift of the lower valve j 'and'the.amount. of liquid I entering. the spacesurrounding the box m so thatthe, walls of the box or casing m due to the .variation' in. capacitythereof..

Before the; end of the pump piston stroke,

order to neutralize the efl'ect of thepressure return to their initialposition, which causes the valve to close thereby retaining the quantityof liquid admitted.

t e' compression stroke of the pump piston, the pressure of air which isexerted on the casingm' 'acts on the walls thereof in Order to separatethe walls one from the valve then closes and retains the ascendingliquid till the suction stroke of the pump again takes place.

In the construction shewn in Figure 4 the aneroid box m is arranged inthe interior of the valve box is, which is of suitable diimensions tocon in the box m whilst permitting; of the pulsating action of the wallsthereof.

The action of the apparatus shewn in Figure 4 is the same as that ofFigure 3, that is to say, on the suction stroke of t e pump, the boxorcasing m is contracted under the effect of the depression, resultingin an increase-in the capacity of the champipe y throug the non returnvalve 7.

By reason of its particular construction the aneroid boxor casing m isabsolutely fluid tight, both to air and liquid The air pump in place ofbe in echanically operated may be operated by hand, a construction ofthis type being shewn-by wa of example'in Figure 5.

he hand pump comprises a cylindrical body n having a tubular extension non the extreme bulbous end of which is fixed the flexible or other hoseconnectingthe pump with the pulsator. cylindrical body is a piston 0,provided with a rod 0 terminating in an operating-knob or button 0 a nonreturn valve p having a tubular extremit is arranged at tli is subjectto the action of a spring pf the displacement of the valve 12 beinguided and limited by a stop or sto s. penings' n and. n are provi edbod n, 1

e action is as follows On .the suction stroke 'the valv, '1); under theaction ofthe'spring p" COVeISidlQ openings n and-closes the admission ofatmos- -pheric -..air to the cylinder n; a reductionin pressure in thepassage or passages and. in-

the bottom of the"cy linde'r n, and consequently in the capacity forairvof the pulsator. I

At the end of its stroke, when the piston 0 passes the openings natmospheric. airenters thefcylinder n and continues to do so untilv thepiston movingjin t opposite direction passes the openings In theinterior of the in t e cylindrical.

. The pressure in the cylinder '12; then in i I I flcrea ses and.consequently -the air capacity of the pulsator; atmospheric pressure isagain re-established when, at or about the end of the compressionstroke, the piston 0 acts in the valve 10' so as to uncover the openings70?.

What I claim is v 1. In a liquid elevating apparatus, a cylinder, apiston mounted to reciprocate therein, a valve connected with thecylinder and having means to contact with the piston and be openedthereby when the piston approaches the end of its compression stroke, aconduit receiving the liquid to be conveyed, inlet and outlet checkvalves connected in the conduit, a shell connected with the conduitbetween the check valves, a flexible diaphragm arranged within theshell, and a conduit for connecting the cylinder and diaphragm. p

'2. In liquid elevating apparatus, a pulsator having a flexiblediaphragm, an air pump arranged in a casing of stream line form, thebodylof the pum being connected to the pulsator by a flexible hose andbeing provided on the support of-the said flexiblehose with an auxiliaryvalve having a rod extending to the interior of the pump body anddisplaceable by the pump piston, and openings in the auxiliary valvecasing adapted to place the pump body and the interior of the flexiblehose in communication with the atmosphere.

3. In a liquid elevating apparatus, a cylinder, a piston mounted toreciprocate therein, an air inlet valve associated with the cylinder, astem connected with the valve and projecting into the path of travel ofthe piston to be moved thereby to open the valve, a spring to move thevalve in an opposite direction to close it, a liquid conveying conduit,inlet and outlet check valves connected in the conduit, a shellconnected with the con duit between the valves, a flexible diaphragmarranged within the shell, a conduit connected with the cylinder andadapted for connec-- tion with the diaphragm, and means to move thepiston.

4. In liquid elevating apparatus, a pulsator having a flexiblediaphragm, an air pump arranged in a stream line casing; the cylindricalbody of the said pump being connected b a flexible hose to the pulsatorand provide at the bottom with an auxiliary non return valve having arod actuated by the pump piston about the end of the compression strokeso as to place the body of the pump and the flexible hose connectingwith the pulsator in communication with the at mosphere, the pulsatorbeing formed by an aneroid box having thin metallic walls,

flexible and capable of being contracted and expanded under the combinedeffects of de creased and increased pressure induced by the pump placedinthe valve box and dividing this latter into two compartments, one ofwhich communicates with the pump, and

the other with and between two non return valves opening and closing inthe same directive' sense and interposed on the length of the ascendingcolumn of liquid to be raised.

5. In liquid elevating apparatus, a pulsator having a flexiblediaphragm, formed by a box divided into two compartments, onecommunicating with a non return valve box interposed in the length ofthe ascending column of liquid to be raised, a pump having a cylindricalbody connected to the other compartment of the pulsator box and of whichthe piston abuts or strikes at the end of the compression stroke againsta spring pressed valve thereby uncovering openings provided in the bodyof the pump which allow of the body of the pump and the flex-,

ible hose connecting it with the pulsator communicating with theatmosphere.

In testimony whereof I have hereunto signed my name.

HENRI KAPFERER.

